🇺🇸💥 How the U.S. Took California from Mexico — The War That Changed Everything 💥🇲🇽 In 1846, the United States declared war on Mexico — a move that would redraw the map of North America forever. What started as a border dispute over Texas turned into a full-scale invasion that ended with the Treaty of Guadalupe Hidalgo in 1848. The result? The U.S. gained California, Arizona, Nevada, Utah, and parts of Colorado and New Mexico — all in one deal. Mexico lost nearly half its land. But here’s t